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37 results for “compositional turnover”
Data from: Temporal turnover of the soil microbiome composition is guild-specific
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Data from: Effects of breeder turnover and harvest on group composition and recruitment in a social carnivore
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FIGURE 1 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 1. Map of Australia with major clusters retrieved from the analysis.
FIGURE 8 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 8. The interim zoogeographic provinces of Australia.
Data from: Incorporating existing thermal tolerance into projections of compositional turnover under climate change
Aim: Observed, realized niche space often underestimates species' physiological tolerances due to interactions with other species, dispersal constraints, and because some combinations of influential environmental factors do not currently exist in the real world. Conversely, correlative ecological niche models rely on the assumption that the range of environmental conditions encompassed by a species' geographic distribution accurately reflects their environmental tolerances, including community-level approaches like Generalised Dissimilarity Modelling (GDM). We extend GDM to better understand what effect broader environmental tolerances could have on compositional turnover under climate change. Innovation: We show how GDM can be adjusted as a function of best-available estimates of the average ratio between realized and potential niche widths to modify projected temporal turnover. We demonstrate this approach by using the estimated niche ratios of Australian plant species (n=7184) relative to thermal extremes, and the rate at which this ratio varied with temperature. The modified GDMs showed existing thermal tolerance could reduce the turnover predicted by standard models under climate change by up to 11%. We further show how the reduction in expected turnover by 2090 will influence where a greater proportion of the current community will persist in a region. Main conclusions: We suggest that standard spatial GDMs and their modified versions represent the extremes of ecological niche perspectives (i.e. realized and potential) and the range of tolerance communities may have when responding to environmental change. GDM projections therefore identify the range of uncertainty associated with a critical model assumption, and as climate change continues, ongoing community monitoring could be used to validate the balance between the two possibilities.
Data from: Nitrogen enrichment and warming shift community functional composition via distinct mechanisms: the role of intraspecific trait variability and species turnover
<p>1. Global change factors may shift community functional composition by driving species turnover (species occurrence and species relative abundance) and intraspecific trait variability. However, their relative contribution in determining the functional response of community to global change, especially nitrogen enrichment and warming, remains unclear.</p> <p>2. We conducted a fully factorial field experiment in a Tibetan alpine meadow to examine responses of plant community functional composition to nitrogen enrichment and warming by quantifying seven plant functional traits in each plot. Using the sum of squares decomposition, we further disentangled the relative contribution of intraspecific trait variability and species turnover to changes in community functional composition.</p> <p>3. We found that nitrogen enrichment caused a shift of plant community toward a more resource-acquisitive strategy, while warming resulted in a shift toward a more resource-conservative strategy. Plant intraspecific trait variability controls shifts in community functional composition in response to nitrogen enrichment, whereas species turnover (especially change in species relative abundance) mainly explains warming-induced shifts. Nitrogen enrichment and warming did not show significant interactive effects on plant functional composition.</p> <p>4. These findings suggest that nitrogen enrichment and warming can alter community functional composition of alpine meadow through distinct mechanisms. Plant intraspecific trait variability confers functional resilience of Tibetan alpine meadows under nitrogen enrichment, but warming could induce significant turnover of species that pronouncedly impacts community functioning in this highland ecosystem.</p>
Intraspecific trait variation and species turnover mediate grazing impacts on above- and below-ground functional trait composition of plant communities
<ol> <li>Although grazing has significant impacts on plant functional traits and community composition in grasslands, few studies have simultaneously explored how plant above- and below-ground traits and community functional composition respond to grazing.</li> <li>Using a grazing manipulation experiment with seven levels of grazing intensity (0, 1.5, 3.0, 4.5, 6.0, 7.5, and 9 sheep ha<sup>-1</sup>) in the Inner Mongolia grassland, we partitioned the roles of intraspecific trait variation (ITV) and species turnover underlying the grazing induced changes in above- and below-ground functional trait composition of plant communities. Six aboveground traits (i.e. plant height, plant aboveground biomass, plant density, leaf area, specific leaf area (SLA) and leaf density) and three root traits (average root diameter, ARD; specific root length, SRL; and root tissue density, RTD) of the first-, second- and third-order roots (1<sup>st</sup>-, 2<sup>nd</sup>-, and 3<sup>rd</sup>-) were measured at the plant individual level. </li> <li>At the community level, plant above-ground traits shifted towards grazing avoidance strategy (e.g. plant height and leaf area decreased), and below-ground traits shifted towards conservative strategy (i.e. 1<sup>st</sup>-SRL and 2<sup>nd</sup>-SRL decreased, 1<sup>st</sup>-RTD and 2<sup>nd</sup>-ARD increased) with increasing grazing intensity. Functional tradeoffs were found between plant individual biomass and plant density, and between leaf area and leaf density under grazing. However, community-weighted mean SRL (SRL<sub>CWM</sub>) and ARD (ARD<sub>CWM</sub>) of different root orders exhibited functional coordination under grazing pressure. SLA<sub>CWM</sub> and SRL<sub>CWM</sub> also showed synergistic responses to grazing.</li> <li> The ITV plays a predominant for the changes in above- and below-ground functional trait composition at the community level. However, changes in mean trait values among plant species with different resource use strategies were mainly triggered by species turnover. For species with different resource use strategies, grazing exhibited a coordinated effects on ITV but an offset effect on species turnover.</li> <li> <i>Synthesis.</i> Our results demonstrate that both the above- and below-ground trait composition of plant communities shifted toward conservative strategy under long-term grazing. This study highlights the effects of ITV and species turnover that govern the grazing-induced changes in functional trait composition of plant communities, and has important implications for grazing management in semiarid grasslands.</li> </ol>
Intraspecific trait variation and species turnover mediate grazing impacts on above- and below-ground functional trait composition of plant communities
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Data from: Incorporating existing thermal tolerance into projections of compositional turnover under climate change
Open the record for dataset details and reuse information.
Data from: Nitrogen enrichment and warming shift community functional composition via distinct mechanisms: the role of intraspecific trait variability and species turnover
Open the record for dataset details and reuse information.
Protein Turnover in Preterm Infants - Feeding of Target Fortified Breast Milk With Different Macronutrient Composition to Improve Growth
ClinicalTrials.gov study NCT04854226. IPD Sharing: NO. Countries: 1. Publications: 0.
Assessments of Adipogenesis, Lipid Turnover and Cellular Composition in Adipose Tissue in Response to Endurance Exercise
ClinicalTrials.gov study NCT06602141. IPD Sharing: Not stated. Countries: 1. Publications: 0.
FIGURE 3 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 3. Phytogeographical subregions of Australia (Ebach et al. 2015), based on the analysis by González-Orozco et al. (2014b).
FIGURE 6 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 6. The Bassian subregion as proposed by Main et al. (1958). Note that the Bassian includes the South-West Australia subregion.
FIGURE 2 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 2. Map of Australia with the location of the 3 Clusters and their corresponding Subclusters (a-c) in relation to the regions.
FIGURE 5 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 5. Faunal subregions of Australia by Spencer (1896).
FIGURE 7 in Quantifying vertebrate zoogeographical regions of Australia using geospatial turnover in the species composition of mammals, birds, reptiles and terrestrial amphibians
FIGURE 7. The interim zoogeographic dominions of Australia.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.